The Japanese really need a late war fighter that has insurance against the Allied whiners in the CT.
The N1K2-J fails to deliver because it has no insurance against gripes about the small numbers used and gripes about how late it entered the war.
There were 3,514 Ki.84s built. That is the third most produced fighter from Japan, losing only to the A6M with 10,937 produced and the Ki.43 with 5,919 produced. There were only 406 N1K2-Js produced. Because the Ki.84 was so common from mid 1944 on the Allied fliers can't get rid of it without also talking away their late war fighters.
The Ki.84 entered full squadron service in April, 1944. That is a month before the P-51D entered squadron service, and three monts before either the F6F-5 or P-38L entered service. The N1K2-J may have entered squadron service as early as November, 1944, but the first combats that I can find for the N1K2-J happen in January, 1945. Once again the Ki.84 delivers insurance against the Allied fliers being able to get rid of it without getting rid of their own late war fighters.
We need the Ki.84.